Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8fa1538ac29081a377ad1c0bf3716785cf00fc19bc71982c7cb87325ab53c4f' 
  AND token = 'mDseT6CV1FWipBJnAwNOut3ToL57OweQ+R6C341BXEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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