Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ac3ce7539455d56544757c4d9c2a578da5dbd223a4644380e2438ccc211263c' 
  AND token = 'cttCSQYbGZD5R/zzte1FkZUWAlHGwroePE2ACkFqtik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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