Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd2b7f62c7dd7a5a03e9234998aa99cef789553445bd62ce3665ee53ef27ae03' 
  AND token = 'sPTv2xABpYFrsBkii07Yi7mXFOH+hqNxxnNhDJOW3nY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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