Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04c6436c1aedf8820f70eae0ba2b78c68225970cb2571dfa1a90a7e23da7d11e' 
  AND token = 'xrdWDtNglsaEUEltWshWCHgICYQVklKhNk0cS4ldjAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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