Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a22946a2f476e4fd75702ea29f138b5442bbdfaba02a58c62211d31120e4806' 
  AND token = 'dz5vuJKAScI22T48CFQSJh4c8fWFFM6agv3LmpiHzfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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