Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c425e2b370ff2eba5706963d221893e51c6e047552c4cc8ad7be69eade0c3024' 
  AND token = 'e11/vwF2ZR6hKAnXxoNs70OYPZcpAkM/RnK0Cbz4oOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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