Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd70297e85a1d735f57eda843fbdcc0a93c42315816f6b0c996823dddaeb3b4a8' 
  AND token = 'VE3rMDz/Csxn1YE/zihhfDCEajaU0wAXdR3u5EpKgXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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