Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4edc51c627af5583e7e33883659bd5762bc6a47d4b34b3f4cc2e073d930c807f' 
  AND token = 'sw/55GBWWCWbVvYUPpY1DSUmMNC33ltHTUsIMQ/IKb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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