Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcd3acec46946665e778645146a5d100c360948445b6aa605ddbd97698fa63cb' 
  AND token = '2JUJRZF6ASQch/rec9cxy/irDJtmQEqlh5Q39TvMF4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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