Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f79bec5084600b4360976b4c0fcaf6fbac98c37a236951ae2ef78e3e7ae3695' 
  AND token = 'Ezzrg0TAc2iDIY0OZXG0jT3PLPXr+9f9jkFpG5hFb1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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