Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '221670458e9e065c41adc42688df9070742744797a96559287a29185513b46d1' 
  AND token = 'R9kcfKY/4bIUQRT7iA5aKx4VqPsp0MD2G2bvq2G9hQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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