Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76db417c267ce9ee44630ac9481fcb495891fd5839b1b9be977e5038d6a7025a' 
  AND token = 'QBOAtP2oEdw8HJp+gH3PK73fkzceRxs+JI9LRF74ku8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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