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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'a4e3442c4b087c1b15640854b4e27b40c9474ce014f59efdf48d8af6c94c4412' 
  AND token = 'gqv6GEAco/RvvA5E/TUVNGPu+a7AI4VF8e60GukY6Ew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01470

JSON explain

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