Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '502bfe158d4f6b2b665e6aa6894677e872f0fdc8c44ec073af068a17a907016e' 
  AND token = 'Zs2Xw3kELaTVlhWcvuxaxMLSdvph971faoptokybVxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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