Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbaaf033c25250f66f2ded9310b1a4dd6bb9661feaee83114c45aeb2a5215174' 
  AND token = '12qvzfPaV/THt4XzvN9YkIZcj0gvgryxiCuEF6sw/LQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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