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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '06084b0b17ba00c47ca72f2f69d396c0b227ef45ef0f86e2fc3171ce2cbe2994' 
  AND token = 'uCMe8kyijruIUd4ItudciNAJKSOzAAzb2mZgL62Afvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00781

JSON explain

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