Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41a82f004b3aff071733f01ecdac93f3f2b7c2dbd7e09aa84667ac161d0dc876' 
  AND token = 'OqUlV3PRqtue7AON2k0JRZiFk5PDR/ZtgNKG7DgxTgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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