Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f774e98df13c01d8832ea611287841b818c2702bbd23ff3ce1ad0d02d5ace2df' 
  AND token = 'K291E0AZFFOq6v0fLUkpbExOKtoQNloL45Bn60OVzo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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