Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f85f8e7c5477a6f4f966d3e6de39b6b0f5deb59530227f5897946b8f54cabd9e' 
  AND token = 'jBwUOMFnCfyLlz34Jb8ErNx+Fze5D+uraFh19DXEEYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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