Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5010253c382bcdffbe52d87db276cd15fe7a66de079586048558d359cad7bd77' 
  AND token = 'gAU6QSJWyehd5aoSr7YFqL+Csd4bWIlFYjRrzPBMs2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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