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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'aafa459a7cdfb416673a2dba9d17aa415d50dc4ff8e925ebbd38498906614d81' 
  AND token = 'wrlP1I8DsseBeWJmWS8ypghfF26Wo9PZoG1lRqWRxw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}