Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8615dec7b889c5a366a691e8a6fbb66c73d5f276d908e5495a7edbb60dcaf0c4' 
  AND token = 'FlZWT3L9jR756p34tBC0CxxiCkotbBAICgEZ+M1rEbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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