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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '5080b0670559fd483cdca2701f49f440bf3b410e6decc8a1e664de47f3bdff31' 
  AND token = 'Xs1hqiSsopSWma2MN4jXwD0mQMi+VeLwJNBJt+RC3rA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00948

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}