SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd0407904c2aab645bbbacdfc2f60e5afd43fc58758d32d596629d5b73797bd1b' 
  AND token = 'Zvr+7ksnl1eFRzLagfwXGwM5LSsKsJgx2T/Rk5i/nvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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