Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '235d9555fd6a3f2cea558822c7f16e82e48cddb8cfcc2127a53a878aef586645' 
  AND token = 'tJNpOOg/B2U3+EQ6hY+wX+Wq+0WE0NztN4gtzqL+hrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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