Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53ae41524d7dd6947ca3c89dfd130f75aac1d57da7a16d2ba064513e0ec32daf' 
  AND token = 'dw67iJEzbkONhW0vizc1Y+8pEn37WLA3UGBgc91SBvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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