Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '713276f5c69262dfded1f03b803192c7934fe687b67640cff54cfc8e36f4dce4' 
  AND token = 'sgBjPJeV4WPQ7T2pvmyPTbpnLnNAnpODDjOKbQuywL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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