Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c823f759680ee47b8b910aa969c8800c38dce39b7055a49744494dae09a9d5fd' 
  AND token = '63EGxod97Y0lwtDyz2LZnPQx9CIjuMNUdmyqkUHrikg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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