Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed93d3f2967a5575842549759cdc8efebda30e22e4d0166f7bac14c5815790f9' 
  AND token = 'L3tolwWk0QdVjBtDsrbRqzUi8WrhXarEc8K9JWK/WGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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