SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9c422d6905c988f8dd36e5521ccbc3902464a6d3dfb9413a46b8af20ff35d25e' 
  AND token = 'Iq4c8UUTSOcECbL7qY7wh0Cwrm9JSEPXCeYioE/Hv8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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