Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4acf4b9df64ea79f20685e5f12618d45e11bd56de51c090aac74f104a98a95c' 
  AND token = '+cmgAGB8t50H2gTPCX72CA+qRhz8C8aDq+nM6aa5JN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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