Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ebce00ed7e0373b82c06a14a2c222c28b98e610274fad831d6b25fa5d2c9f83' 
  AND token = 'XmLuhljXItCHtB00OTUG5CEk0giZaCMSkVLV8M0RnhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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