Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e227059d256642b7c23ade1f4a2989f7f7ea3ea6ed783c606537be0737f25c3' 
  AND token = 'dYoUYdvQ4knYCqvH+zllsP8Hi7vak/O6m0E98SPtJ40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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