Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65723d251530b853c6eb2bf12faf400cbfc748f8ba1dac74b6f2ffc1d80bafaa' 
  AND token = 'mJJ5EePcYrX0tMaCUcpIGp0w6Q8qyPphKBUGD/IX5f8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}