Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f90002aa1b3deb5fcd8f7fa2511737c6221250c0901c58fa62cb280925a72b2c' 
  AND token = 'el5gS4E8XyVOpLXJJdUT2ADMNDfg1cliaXFUUvxJ+ds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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