Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5f26f5dfd99a1f9fc6cdf8c4d504edf3c3612f4681056e81649c6d35108798f' 
  AND token = 'FFr2cLrSdFXSO3CymEbOJiB8H8UcJdJ4jaT1loKo7wM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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