Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'bc95b1646fb1943cb5803d494957b0fc90f3fb87b58c3355c9e434307981445b' 
  AND token = 'pfom1NkXAeAh6a7OKGeG4NFf2uDrcoesF3pzmSs7Bgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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