Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '966774ea204fb44b3dcc65ca1ed80f98e9a7787748a0a9775b4a4c01a73b765c' 
  AND token = 'RDf2o3q5za9Vp0WY95lJkcDkSGLPtUfOv+O7cglq+2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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