Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2d05f37392e0cd22dc1b8c98957c70f63e28c29910445b8641f6242067f4d34' 
  AND token = 'WUeEzbT0+gXitemdO7bkE62JPhc/WFSNP3G4kbFnr5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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