Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '175ac5ed7437d9b01b3e208c40ce898c1ce2b3d1bcd9ecd525990ef9a9e504c1' 
  AND token = 'kiuS+BUjLRN64ndA7ZTU3W9Ysp+olx1JQY1dyzsep/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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