Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87ed59eac0d10c93a096ceb32df43a963840cf3635c2357941ac61158bf49adf' 
  AND token = 'ewJ7Y5g4nR9C4+H127CGimGsE4VdSVVheDDrw1wofGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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