Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cfc7493342f4bfcefa7bead02cd150d6db49ad24446c809eaf2df7ee4f2d183' 
  AND token = 'WHpVibK4xzKImD+68EwLhhdeabQdQZiHjgR5h4YEO5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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