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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60bdaf8bbcaaa9d65523122f94e9d709e8fe7b703a5d25f24ebdec688a5f5216' 
  AND token = 'ApJ50VZBtJs441SJSzGSlfKRByzvECceJ4DE9gS7Kw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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