SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b1429bd9c2778b922b24a6cad7e8605a87fb803859fe695ee5c642e9a7c9c3e' 
  AND token = 'gCh5G5Bj6wjyP0QZHbzmHWDljVrPa6gSBRLCQXUbqM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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