Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6680cf5a3e68268a11394dbfbf969c57f6af5b7af285e0df8cb077f4deca02b' 
  AND token = 'ZRNAJrhS7mm6J3HssGw2XAtVt3xKtaazCQTPlNmKy+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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