SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05da0c8223606235202dc1a64da1d1ecbbcef79b6ef08b8c40b9bd7033ed327b' 
  AND token = 'LLx9imPfBos7J95Pd5Rq4/XmVI3IK6/C7zM+WCr5hGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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