Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4158be04c7da3c74636686b9dbcc3b98651f634e870e6d74ceca947c8b8b54e2' 
  AND token = '7wQ5Yhtxec6Yf0WU75FBZcLIsnihH/6W8lYYroRhOjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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