Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddb56ac294702ca30bb8f447dc29dd0d88b0819403da7fedfca192ce2d120583' 
  AND token = 'G8iYCA5sPC75p7lzGpUEEWgPPluJjMchDbrcPk8AYQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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