Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84bce166b4346946b35353659eb106b6f3f50b5b894287e192252a855fe03290' 
  AND token = 'uEaPQ2F8wGYOsQBj9RC+QXq7/iuN1l/j5gRe1O2l7YQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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