Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88ccb35e9365e07472de2ebfbe3ae7491bb85901e879c2619a5de27fd52d4973' 
  AND token = 'PLG1WLhb1m0nw+fAxF6mwkeO+NDdkeUIbpQ2t49iRhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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