Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7f8e4862db665797bd08331397c7877852282e0d78a26105da1e52327f6f2d7' 
  AND token = 'BGnyC36S3tWXq1IrzSoRaYHFQ5r7RWTEic0hBbNaVz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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