Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b13db9b81de3ad87aa8aeb56534c816903ae5a88856bf9dd902f1818e736607' 
  AND token = 'zt1VdEKfAGuv+5/1wPQ8LqjVf0X1AdvRXyVyz9Yaw5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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