Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccf0452ac5e3457dd8bd7f566a60f2cb1c95e4ccf580a5b54db3dea6482b19a9' 
  AND token = 'sWz3udIbq7x1uNIcW05Gwc649C583RCY5wnY5kuEQvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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