Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2911a31731fbadcd7d4629be60420990eda51f3bc720a880a0ad15b7e52a76b3' 
  AND token = 'dw2TP9wh+mHzh5eeERXN8V2QZWWx53zEn6aEb383ONo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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