Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3686e00c8ef2f5ddb9fb11ba748504db71121f321db0e4347c4559e33b1e25a2' 
  AND token = 'Ur9ATHjjyT1Mk+P4d7TqBdPDvZhUCGrlecx7LwhtSdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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