Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f20f94cba0c21f7204e21121b11b7d5e24c48a8db5dafb1ca649efb9143c5fd4' 
  AND token = '7ojB22icrzliGeGJGVVv21puFTGe2KDfgAk+7KT945s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}