Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5195a9848eef5814cd8f60b1e3371b15632347955f2506a82da8e61900d8d619' 
  AND token = '2+mOossm8GN2vc9LafBqrZHyNg7Q2VoXBvC36Ez/kCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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