Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17193a3b401a20a2cd35cf197496c0793a69887ec27658b357aed85e085acbe1' 
  AND token = 'liNKq4pv4nN1xC4EuF/0OP6K81orx44v3jbWELLoW78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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