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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1fd9c60f14f8d6a8f315d3ed64e1e9c51e6235f6567b18b74d02f79562e9293d' 
  AND token = '3hnKHsOC9W3MTRy4O9v5mIEw0u3fcHcplT4L2T3YM7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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