Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0db0ed3e7672b4aa2da4eaee400fd627d1710be0dfa4bbb74ef6a73bcf1ebb34' 
  AND token = 'dmd5RiecYyRsia7QVFYlWob8++mah0B1OUc7nRw0NEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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