Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c21667b680195a01533ec255fe9f93c97b111348e265a85efc914e6532204f51' 
  AND token = '106bQDJ1GmjRKnN/pceWCieXFHZq3A6PsZ0nXSALqpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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