Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e272ec724158b4db695d59361d41e5f14c13919a9279fcbfa3b5b68582e6907d' 
  AND token = 'dDfrxhe5akCViAcWQY1gVuCR973HNVk68eS+EgCxnAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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