Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8612b03e00e9d482fa61f11218eedc154626c1dc80e61880383a0f1210570b39' 
  AND token = '5pZ2MBV7VZ8mePsAhjU+40J3MCTo1dBbagqNIHJ3M/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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