Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6763b65e78acf4435edd346c9fb16e79040c04babdf6037310ee1926aac93326' 
  AND token = 'oNyAjWWM9rJ0EW79PiTBcS/DhKvteLDT+41dKpBdVZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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