Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87ccedce97450b54a8f51b70f2d607ae40ab09caea1624f6cc8bf21d5ca834c9' 
  AND token = 'UBPY7ePJJTgwfpCM/cK6aPvqCmYLgKUZ52CviMo3bdk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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