Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7482b51a555c083b3a1c79c5361979200976b61925a8db439b4ee7031946579c' 
  AND token = 'pBDcvYtEmZ8yt6VJo5Xd6+7Squ2IlCueJN1ZAXO7S2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00115

JSON explain

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