Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10d9187df425e13a67dd19e7ea63a4de19b8f725a743d4432d0c3f991f4b2103' 
  AND token = 'y2u4gy4v2h6+6x2PKysZQsn6sUC3+8ht64jzxji36jQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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