Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aab5b945ffb61e42e3e010d55856c93438f4469b0c4f76666342075811a5dcb' 
  AND token = 't/JRSZDDHwlQL5dDndHiZJFpcU9ve9B50I25lBJxJmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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