Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6965c1d7173d8566875826231be80b73b82c280d9cf07fbd944b02858054a1f7' 
  AND token = 'Akw4UiGvtMnis+ktsYWiCkc/ED354rG2AtXJY6UUBOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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