Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08cb747322b2263236e680b3f738564531a057a5665f54143830d621a482e3dd' 
  AND token = 'IAUmCwzFDr5pZIi0BMkY9ffCnEooeCLCoGgp8BpX9AU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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