Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfc44c07cde565ff5f7c67df40f35ed5287bd6b6a344c564cf4da337383b1cee' 
  AND token = 'jbL87xEdilT/76ataVHCpoX/6dI7x50sgY8qmAYyhKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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