Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3db5e228d8dbc3006bb864f39d51560d4fd31a80e4df6a51549ef5fbab44fb8d' 
  AND token = 'I0hX2gf3WB2e1Orn5/vQ44IWO+6muUz3xJrZu15P3yM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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