Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27d8fda186679d59a1ad340cba2eae9cff5ae3900fffdf8bf0396f9204d38265' 
  AND token = 'MVzyCH2aCGcXA8v4V24+IX2AeK0EdHcYIy9+45grn50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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